build(linux): add alpine reh [skip ci]

package_alpine_reh.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC1091
+
+set -ex
+
+if [[ "${CI_BUILD}" == "no" ]]; then
+  exit 1
+fi
+
+tar -xzf ./vscode.tar.gz
+
+cd vscode || { echo "'vscode' dir not found"; exit 1; }
+
+export VSCODE_PLATFORM='alpine'
+
+VSCODE_HOST_MOUNT="$( pwd )"
+
+export VSCODE_HOST_MOUNT
+
+VSCODE_REMOTE_DEPENDENCIES_CONTAINER_NAME="vscodium/vscodium-linux-build-agent:alpine-${VSCODE_ARCH}"
+
+export VSCODE_REMOTE_DEPENDENCIES_CONTAINER_NAME
+
+for i in {1..5}; do # try 5 times
+  yarn --cwd build --frozen-lockfile --check-files && break
+  if [[ $i == 3 ]]; then
+    echo "Yarn failed too many times" >&2
+    exit 1
+  fi
+  echo "Yarn failed $i, trying again..."
+done
+
+node build/azure-pipelines/distro/mixin-npm
+
+yarn gulp minify-vscode-reh
+yarn gulp "vscode-reh-${VSCODE_PLATFORM}-${VSCODE_ARCH}-min-ci"
+
+cd ..
+
+APP_NAME_LC="$( echo "${APP_NAME}" | awk '{print tolower($0)}' )"
+
+mkdir -p assets
+
+echo "Building and moving REH"
+cd "vscode-reh-${VSCODE_PLATFORM}-${VSCODE_ARCH}"
+tar czf "../assets/${APP_NAME_LC}-reh-${VSCODE_PLATFORM}-${VSCODE_ARCH}-${RELEASE_VERSION}.tar.gz" .
+cd ..
+
+npm install -g checksum
+
+sum_file() {
+  if [[ -f "${1}" ]]; then
+    echo "Calculating checksum for ${1}"
+    checksum -a sha256 "${1}" > "${1}".sha256
+    checksum "${1}" > "${1}".sha1
+  fi
+}
+
+cd assets
+
+for FILE in *; do
+  if [[ -f "${FILE}" ]]; then
+    sum_file "${FILE}"
+  fi
+done
+
+cd ..